tmux: Support dragging into status bar

Additionally to dragging a window onto the target destination, add
support to drag it further than the outermost windows.

.config/tmux/tmux.conf

@@ -99,8 +99,13 @@ bind -n MouseDragEnd1Status {
 	setenv -u tmux_move_direction
 }
 
-# TODO: Move to beginning or end like in MouseDragEnd1Status
+# TODO: do nothing on drags that don't start on a window name
-# bind -n MouseDragEnd1StatusDefault display-message "#{e|>|f|0:#{mouse_x},#{e|/|f:213,2}}"
+bind -n MouseDragEnd1StatusDefault \
+	if -F "#{e|>|f|0:#{mouse_x},#{e|/|f:#{window_width},2}}" {
+		move-window -t #{last_window_index} -a
+	} {
+		move-window -t0
+	}
 
 # Repeatable window-movement bindings
 bind -r \{ swap-pane -U